WO2022023264A1 - Boîtier antidéflagrant pour un dispositif électronique de puissance - Google Patents

Boîtier antidéflagrant pour un dispositif électronique de puissance Download PDF

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Publication number
WO2022023264A1
WO2022023264A1 PCT/EP2021/070851 EP2021070851W WO2022023264A1 WO 2022023264 A1 WO2022023264 A1 WO 2022023264A1 EP 2021070851 W EP2021070851 W EP 2021070851W WO 2022023264 A1 WO2022023264 A1 WO 2022023264A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
sleeve
screw
cover
deformation
Prior art date
Application number
PCT/EP2021/070851
Other languages
German (de)
English (en)
Inventor
Steffen Mueller
Waissi Tello
Original Assignee
Sma Solar Technology Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sma Solar Technology Ag filed Critical Sma Solar Technology Ag
Priority to JP2023505394A priority Critical patent/JP2023535597A/ja
Priority to CN202180060707.XA priority patent/CN116195373A/zh
Priority to EP21749593.6A priority patent/EP4190135A1/fr
Priority to GBGB2309804.9A priority patent/GB202309804D0/en
Publication of WO2022023264A1 publication Critical patent/WO2022023264A1/fr
Priority to US18/160,422 priority patent/US20230171912A1/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters

Definitions

  • the invention relates to a housing for a power electronic device.
  • a cover of the housing is fastened in such a way that the cover is reliably held on the rest of the housing body in the event of an explosion inside the housing.
  • document DE 202014 100486 A1 proposes connecting the cover and tub via a deformable fastening element which has a closed ring, with the fastening element being screwed to the cover and the housing on opposite sections.
  • a fastener takes up considerable space and is therefore only suitable for selected applications.
  • document DE 202015 106657 U1 proposes surrounding a housing body or a housing cover at their attachment points with a recess such that a gap is formed between the housing body and the housing cover when an internal pressure in the housing exceeds a predetermined limit value. Also one like this Housing design is limited to selected applications and is particularly useful for housing parts formed from sheet metal by cold forming.
  • This invention is therefore based on the object of demonstrating a housing cover which can be produced inexpensively and with little design effort, and which remains reliably attached to the housing in the event of an explosion.
  • the invention in a first aspect, relates to a housing for a power electronic device.
  • the housing includes a trough for accommodating power electronic components and a cover for placing on the trough, so that a closed housing is formed.
  • the cover is fixed to the tray with a plurality of fixing screws.
  • At least one opening element is provided, which is formed by one of the fixing screws, each of which is guided through a sleeve with deformation structures, which is arranged between the screw head of the fixing screw and the housing, so that a contact pressure between the cover and the tub is exerted by the screw head via the sleeve .
  • the sleeve is designed in such a way that the contact pressure exerted to fix the cover on the tub does not result in any significant deformation of the sleeve.
  • the deformation structures of the sleeve are designed in such a way that under the action of an explosive force that exceeds the contact pressure, triggered for example by an explosion of power electronic components, which creates overpressure inside the housing, the sleeve is compressed in a manner defined by the deformation structures in such a way that a gap of predetermined width is formed between the cover and the tub.
  • the screw heads of the fixing screws are arranged on the side of the tub opposite the cover.
  • the thread of the fixing screw preferably engages in a counter-thread of the cover.
  • the mating thread can be designed as a blind thread, so that the screw connection is not visible on a side of the cover facing away from the pan.
  • the blind thread can be cut directly into the material of the cover, or it can be fastened to the cover as a threaded sleeve on the tub side, for example by being pressed in. The formation of the gap allows the excess pressure to escape from the interior of the housing, with the cover remaining fixed to the tub.
  • the connection between the fixing screw and the mating thread is relieved at the moment the explosive force takes effect, even before the overpressure caused by the explosion escapes, in order to counteract the risk of the tub and lid becoming detached from one another due to the fixing screw tearing out of the mating thread.
  • the deformation structures that are introduced into the sleeve represent a targeted weakening of the mechanical stability of the sleeve, so that the sleeve has sufficient mechanical stability to provide the contact pressure within the scope of a proper cover assembly on the tub without significant deformation of the sleeve. Under the action of the significantly higher explosive force, however, a compressive deformation of the sleeve takes place in a manner determined by the design of the deformation structures, the compression forces required for the deformation being adjustable by the design of the deformation structures.
  • At least one additional braking element is provided on the housing.
  • This additional braking element includes a screw and a further sleeve with deformation structures, the screw being guided through the further sleeve.
  • the further sleeve is arranged between the screw head of the screw of the braking element and the housing in such a way that the further sleeve is only compressed in a manner defined by the deformation structures when the gap between the cover and the pan reaches a predetermined minimum width.
  • the braking and absorption function is essentially separated from the pressing and opening function.
  • the contact pressure is provided by the fixing screws of the opening elements.
  • the sleeves of the opening elements also allow a gap to be formed between the cover and the tub. Only when a gap has already formed does the energy absorption effect of the additional braking elements begin, so that the housing can withstand significantly higher explosion pressures without reaching the destruction threshold.
  • the screws and sleeves of the braking elements are designed and arranged in such a way that the additional absorption capacity only starts from a predetermined minimum width of the gap. Depending on requirements, rapid gap formation can be combined with high energy absorption.
  • the screw heads of the additional braking elements are arranged on the side of the tub opposite the cover and preferably engage with their thread in the same counter-thread of the cover as the fixing screws.
  • this ensures flexibility of the explosion protection and opens up the possibility of adapting the number and shape of additional braking elements to the requirements of the housing.
  • the arrangement of additional braking elements in existing threads of the housing enables retrofitting of optimized explosion protection in existing devices.
  • the screw head and the sleeve of the additional braking element are arranged at a distance from one another. This distance is selected as a function of the specified minimum width.
  • the additional braking elements therefore only contribute their additional energy absorption capacity when the gap has formed in accordance with the minimum width.
  • the screw head touches the starting area of the further sleeve and a transmission of force from the screw head to the sleeve begins.
  • the sleeve is compressed and absorbs additional energy through controlled mechanical deformation.
  • the screw of the additional braking element has a thread that extends over the entire screw shank.
  • the sleeve of the additional braking element has an approximately linear force profile.
  • the fixing screws and, optionally, the screws of the additional braking elements are each arranged in a guide channel of the trough.
  • the screw heads can be guided during screwing and hidden in favor of a uniform appearance of the housing.
  • the guide channel can be used in a targeted manner in order to shape the course of the counteracting forces of the deformation provided by the sleeve during compression. This can be accomplished by selecting the cross-section of the channel in the region of the sleeve in such a way that the deformed sleeve touches the side walls of the guide channel during compression.
  • the sleeve After contacting the sidewalls, the sleeve can provide increased resistance to further deformation, thereby delaying full compression of the sleeve. As a result, the sleeve can successfully absorb higher explosive forces without the screw tearing out of the mating thread.
  • the sleeve is preformed in such a way that it is held captively when it is pushed onto a shank of the screw.
  • This can be achieved by the sleeve being provided on the side facing the screw head with a collar which is directed towards the inside of the sleeve and which engages in a tapered area of the screw shank. It is also conceivable to preform the sleeve in such a way that it has an area with a tapered inner diameter, in which it presses resiliently against the thread after being pushed onto the screw.
  • the screw can have a centering element which is arranged in such a way that the sleeve is pressed against the screw head in a position which is centered relative to the screw.
  • the centering element can be arranged as a conical attachment directly on the head of the respective screw and can be made of plastic, for example. This makes the compression process more reproducible because the sleeve is prevented from tilting.
  • Such a centering element can be used with both the fixing screws as well as at least one of the screws of the additional braking elements.
  • the housing can be designed to fix the sleeve to the trough before it is screwed on.
  • the trough can have corresponding holding structures for the sleeve.
  • the sleeve it is also conceivable for the sleeve to be in the form of a press-fit sleeve which is pressed into a suitable recess in the trough before the housing is screwed on and is thereby fixed.
  • the trough has a shaping structure on which the sleeve is placed and which is designed to determine the deformation of the sleeve under the action of the explosive force.
  • the shaping structure can have a conical area which, under the action of the explosive force, leads to a radial expansion or compression of the sleeve. In this way, the force required above which deformation of the sleeve occurs can be reduced to a suitable value.
  • Shaping structures that act in this way can alternatively or additionally also be arranged on the screw head.
  • the deformation structures can be designed as slots.
  • the slits may extend longitudinally in a central region of the sleeve, leaving ridges between the slits which deform outwardly under the action of the explosive force.
  • At least three slots are preferably provided, so that at least three webs are formed. But it is also conceivable to provide more than three slots. It is also conceivable to provide slits that run in an angled manner instead of longitudinally running slits. Such a design creates a torsional component when the sleeve is compressed.
  • the deformation structures can also have a different shape and arrangement in relation to one another, which lead to a desired compression of the sleeve. For example, it is conceivable to provide a large number of holes in the sleeve. A sleeve with different resilience over its course could then be designed in such a way that holes of different sizes or hole spacings of different sizes are provided in different areas of the sleeve and thus more or less material that has to be compressed remains between the holes. Regardless of their arrangement or shape, the deformation structures can be produced by removing sleeve material. Removal to form the deformation structures can be carried out by laser cutting, but also by other previously known methods. However, it is also conceivable to design the deformation structures as embossed structures.
  • the deformation structures are then embossed by means of a suitable embossing stamp, without the sleeve material being removed.
  • opening elements with fixing screws and sleeves and braking elements with screws and other sleeves are provided in an alternating sequence for fixing and securing the cover on the tub. It is particularly advantageous that, in the case of a housing with a basic rectangular shape, the opening elements are arranged centrally on the longitudinal sides and the additional braking elements are arranged in the corner areas. It has been found that such an arrangement, in view of a local non-uniform distribution of the internal explosion pressure, in particular at the beginning of an explosion when usually only individual electronic power components explode, enables the explosion force to be distributed adequately. Asymmetric gap formation can be counteracted, particularly in connection with sleeves that are flexible in different areas.
  • FIG. 1a shows a first cross section of an opening element of a housing according to the invention in the area of a screw connection
  • FIG. 1b shows a first cross section of a braking element of a housing according to the invention in the area of a screw connection
  • FIG. 2a shows a second cross section of an opening element of a housing according to the invention in the area of a screw connection after an explosion inside the housing
  • FIG. 2b shows a second cross section of a braking element of a housing according to the invention in the area of a screw connection after an explosion inside the housing
  • FIG. 3 shows a first view of a screw connection area of a housing according to the invention
  • FIG. 4 shows a second view of a screw connection area of a housing according to the invention in the area of a screw connection after an explosion inside the housing
  • Fig. 5 three versions of a deformable sleeve for use of a housing screw
  • 6 shows a schematic course of a force development during a deformation of a sleeve of the opening element and a sleeve of a braking element during an explosion inside the housing.
  • FIG. 1a shows a cross section through an opening element of a housing 1 of a power electronic device, for example an inverter, in the area of a screw connection.
  • a cover 3 of the housing is fixed on a trough 2 of the housing by means of a fixing screw 4 and is pressed against a seal 6 arranged between the cover 3 and trough 2 .
  • the contact pressure is exerted by means of the fixing screw 4 which engages in a thread 7 of the cover 3 .
  • a sleeve 5 is arranged between a head of the fixing screw 4 and the trough 2 and was placed on the screw thread before screwing, so that the contact pressure from the screw head of the fixing screw 4 is exerted on the trough 2 via the sleeve 5 .
  • the sleeve 5 largely retains its original shape before screwing.
  • the sleeve 5 has a collar 12 on the side facing the trough 2 .
  • the housing 1 has a single or a plurality of such screw connections serving as an opening element, for example in each case on the housing corners or in the middle on the longitudinal sides.
  • the collar 12 is used to hold the sleeve 5 on the trough 2, for example by pressing it into a receptacle in the trough 2, and the fixing screw 4 is inserted through the sleeve 5 held on the trough 2 and connected to the thread 7 of the Cover 2 screwed.
  • the interior of the housing 1 is completely sealed off from the outside environment, and the electronic power device is ready for operation.
  • FIG. 1b shows a cross section through a housing 1 of a power electronic device in the area of a screw connection in which an additional braking element is arranged.
  • the housing is in the same sealed condition as in Fig. 1a.
  • a screw 4a of the brake element engages in a thread 7 of the cover 3 of the housing 1 through an opening in the trough 2 .
  • the fixation of the cover 3 on the tub 2 and the seal by the seal 6 arranged between the cover 3 and tub 2 is not provided via the screw 4a of the brake element, but by one or more fixing screws 4 on other screw connections of the cover, such as described in Figure 1a.
  • a further sleeve 5a of the braking element is arranged between a head of the screw 4a and the trough 2, which was placed on the screw thread before screwing.
  • the screw head of the screw 4a and the sleeve 5a are arranged at a distance from one another, so that no pressing force is exerted on the trough 2 by the screw head of the screw 4a via the sleeve 5a.
  • the distance between the screw head of the screw 4a and the sleeve 5a determines the minimum width of a gap 11, which must have opened in the event of an explosion before the energy absorption of the braking element begins by the compression of the sleeve 5a.
  • a centering element 25 is arranged on the screw head, the function of which is to bring the sleeve 5a into a centered position relative to the screw 4a during compression, so that the sleeve cannot tilt. This makes the compression process more reproducible.
  • Such a fixing element can also be arranged on the head of the screw 4 from FIG. 1a.
  • the sleeve 5a also has a collar 12 on the side facing the tub.
  • the collar 12 serves to retain the sleeve 5a on the trough 2, just as with the sleeve 5 of the opening element, for example by being pressed into a seat in the trough 2.
  • the housing 1 can have a plurality of such serving as braking elements have screw connections.
  • the width of the gap 11 that forms can be predetermined by the design of the sleeves 5 and 5a in such a way that it is not possible to reach into the interior of the housing even after the explosion. This leads to an increase in device safety, since dangerous voltages can also be present inside the housing 1 after an explosion, so that protection against accidental contact must be ensured.
  • the design of the sleeves 5 and 5a of the opening elements and the braking elements can relate to the number, the dimensions, the choice of material and the shape of the sleeves 5, 5a.
  • the shaping can in particular also include the provision of deformation structures on the sleeve. For example, it is conceivable to provide holes or slits using subtractive methods, or to vary the local thickness of the sleeves by embossing.
  • the deformation structures serve to define a threshold force above which the sleeve will collapse under compressive force and to influence the deformation of the sleeve upon collapse.
  • the swelling force is preferably at least 20% higher, in an advantageous embodiment at least 50%, than the maximum force acting on the sleeve during screwing of the housing, so that collapsing of the sleeve is effectively avoided when the maximum permissible torque is applied to the screws.
  • FIG. 3 shows a first view of a screw connection area of a housing 1 in an advantageous embodiment.
  • the fixing screw 4 is arranged in a guide channel 10 which can disguise the fixing screw 4 optically and ensures lateral guidance of the fixing screw 4, in particular the screw head.
  • the screws 4a of the braking elements are also advantageously arranged in a guide channel 10 of this type. This counteracts canting of the screw connection both during screwing itself and in the event of an explosion.
  • FIG. 3 shows the guide channel 10 in a sectional view, although it is not excluded that the guide channel 10 is designed in the cut shape shown.
  • the deformation of the sleeve 5 of the opening element forms a gap 11 through which the explosion pressure can escape from the housing 1.
  • the sleeve 5 can collapse to the extent that it touches the inner walls of the guide channel 10 .
  • This increases the counterforce of the sleeve 5 against further deformation, so that the connection between the fixing screw 4 and the cover 3 is maintained up to higher explosive forces than without such contact.
  • Fig. 5 some exemplary embodiments of sleeves 5.1 to 5.3 are shown as they can be used within the scope of the invention.
  • the sleeve 5.1 has deformation structures 14.1 in the form of a plurality of slots between which webs remain. When the sleeve 5 collapses, the webs are bent outwards in the radial direction.
  • the sleeve 5.2 has a deformation structure in the form of a distribution of holes over the sleeve surface.
  • a network of ridges remains between the holes. The network is compressed under the influence of the explosive force.
  • an embodiment with a distribution of holes can advantageously be varied for the sleeves 5a in such a way that different flexible areas of the sleeve 5a result, which allow compression with different force effects.
  • a counterforce of the sleeve that increases with increasing compression of the sleeve can be realized by providing holes with different, in particular smaller, diameters over the course of the sleeve, so that in the case of larger holes, narrower webs are arranged between the holes, which can be deformed when less force is applied are and in the case of small holes, wider webs are arranged between the holes, which are deformable in comparison with higher forces.
  • a captive arrangement of a sleeve 5.3 on a fixing screw 4 is shown in cross section.
  • An inward bend of the sleeve engages in a taper 13 of the screw shank, so that the sleeve is held captive on the shank.
  • Such an arrangement leads to a simplified, more reliable assembly of the housing 1.
  • the security against loss can also be achieved in another way by suitably shaping the sleeve 5, 5a and/or the fixing/screw 4, 4a.
  • FIG. 6 shows a curve 15 of a force F which a sleeve 5 used in an opening element of a housing according to the invention opposes to compression by an offset d.
  • a fixing area 18 which is maintained when screwing the housing with a fixing screw 4
  • the sleeve 5 is not deformed or only deformed by an insignificant offset.
  • the torque of the fixing screw 4 used during assembly leads to a force F that corresponds to a starting point 16 on the course 15 .
  • the sleeve 5 is preferably designed by the design described above in such a way that even with the maximum explosive force to be taken into account, the end point 17 is at a sufficient distance from this end of the deformation region 19, i.e. the sleeve 5 does not collapse completely and the thread 7 is thus relieved. so that the fixing screw 4 cannot tear out of it.
  • a design can be designed by means of calculations, for example using finite element methods, if the pressure profile is known, for example from preliminary tests.
  • a design of the sleeve 5 can be determined or optimized by series of experiments with different explosive forces.
  • the sleeve 5a is only compressed when the gap 11 has already opened by a minimum width 22 .
  • the sleeve 5a is also transferred to its deformation area 19.
  • the course of force 21 is advantageously linear as the gap opening increases, in the sense that an increased counterforce is applied as the compression of the sleeve 5a progresses by a further offset d.
  • This can be realized by an advantageous design of the deformation structures of the sleeve as described above.
  • the end point 23 of the deformation region 19 should also be selected for the maximum explosive force to be taken into account in such a way that the offset d corresponding to the end point 23 is less than an offset d corresponding to a complete collapse 24, at which the associated force F rises steeply.
  • the counterforces of the sleeves 5 and 5a add up for the total counterforce of the cover 3, so that the housing 1 can withstand higher explosion forces, or the overpressure generated by the explosion of components can be better reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)
  • Patch Boards (AREA)

Abstract

L'invention concerne un boîtier (1) pour un dispositif électronique de puissance, comprenant un plateau (2) pour recevoir des composants électroniques de puissance et un couvercle (3) pour être placé sur le plateau (2) de telle sorte qu'un boîtier fermé (1) est formé. Le couvercle (3) est fixé sur le plateau (2) par une pluralité de vis de fixation (4). Au moins un élément d'ouverture est réalisé dans l'une des vis de fixation (4), chacun d'entre eux étant guidé à travers un manchon (5) avec des structures de déformation (14.n), ledit manchon étant disposé entre la tête de vis de la vis de fixation (4) et le boîtier (1) de telle sorte qu'une force de pression est exercée par la tête de vis entre le couvercle (3) et le plateau (2) par l'intermédiaire du manchon (5). Les structures de déformation (14.n) sont conçues de telle sorte que, sous l'effet de la force d'une explosion qui dépasse la force de pression, le manchon (5) est comprimé d'une manière définie par les structures de déformation (14.n) de telle sorte qu'un espace (11) d'une largeur déterminée est formé entre le couvercle (3) et le plateau (2).
PCT/EP2021/070851 2020-07-27 2021-07-26 Boîtier antidéflagrant pour un dispositif électronique de puissance WO2022023264A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2023505394A JP2023535597A (ja) 2020-07-27 2021-07-26 パワーエレクトロニクス装置用の防爆ハウジング
CN202180060707.XA CN116195373A (zh) 2020-07-27 2021-07-26 用于功率电子装置的防爆壳体
EP21749593.6A EP4190135A1 (fr) 2020-07-27 2021-07-26 Boîtier antidéflagrant pour un dispositif électronique de puissance
GBGB2309804.9A GB202309804D0 (en) 2020-07-27 2021-11-25 Explosion-proof housing for a power electronics device
US18/160,422 US20230171912A1 (en) 2020-07-27 2023-01-27 Explosion-proof housing for a power electronics device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020119779.9 2020-07-27
DE102020119779.9A DE102020119779A1 (de) 2020-07-27 2020-07-27 Explosionsgesichertes Gehäuse für ein leistungselektronisches Gerät

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/160,422 Continuation US20230171912A1 (en) 2020-07-27 2023-01-27 Explosion-proof housing for a power electronics device

Publications (1)

Publication Number Publication Date
WO2022023264A1 true WO2022023264A1 (fr) 2022-02-03

Family

ID=77180004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/070851 WO2022023264A1 (fr) 2020-07-27 2021-07-26 Boîtier antidéflagrant pour un dispositif électronique de puissance

Country Status (7)

Country Link
US (1) US20230171912A1 (fr)
EP (1) EP4190135A1 (fr)
JP (1) JP2023535597A (fr)
CN (1) CN116195373A (fr)
DE (1) DE102020119779A1 (fr)
GB (1) GB202309804D0 (fr)
WO (1) WO2022023264A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN218603800U (zh) * 2022-08-11 2023-03-10 华为数字能源技术有限公司 箱体及电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391829A (en) * 1931-11-05 1933-05-05 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breaker tanks or like casings subjected to heavy internal pressure
US3638364A (en) * 1970-02-19 1972-02-01 Cincinnati Milacron Inc Guard device for machine tools
DE202014100486U1 (de) 2014-02-04 2015-05-05 Sma Solar Technology Ag Deformierbares befestigungselement und wechselrichter
CN104835929A (zh) * 2015-05-07 2015-08-12 深圳市慧通天下科技股份有限公司 防爆电池箱
DE202015106657U1 (de) 2015-12-07 2017-03-08 Sma Solar Technology Ag Gehäuse zur Aufnahme elektronischer Komponenten
CN207555070U (zh) * 2017-12-14 2018-06-29 周祥彬 一种收发球筒二次泄压螺栓保护装置
US20190128358A1 (en) * 2016-06-12 2019-05-02 The Boeing Company Load Controlling Bolted Flange Deformable Spacers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014100486B4 (de) 2014-01-16 2022-08-04 WIMAG GmbH Haltevorrichtung zum Anheben von Rohren und Verfahren zu deren Betrieb

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391829A (en) * 1931-11-05 1933-05-05 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breaker tanks or like casings subjected to heavy internal pressure
US3638364A (en) * 1970-02-19 1972-02-01 Cincinnati Milacron Inc Guard device for machine tools
DE202014100486U1 (de) 2014-02-04 2015-05-05 Sma Solar Technology Ag Deformierbares befestigungselement und wechselrichter
CN104835929A (zh) * 2015-05-07 2015-08-12 深圳市慧通天下科技股份有限公司 防爆电池箱
DE202015106657U1 (de) 2015-12-07 2017-03-08 Sma Solar Technology Ag Gehäuse zur Aufnahme elektronischer Komponenten
US20190128358A1 (en) * 2016-06-12 2019-05-02 The Boeing Company Load Controlling Bolted Flange Deformable Spacers
CN207555070U (zh) * 2017-12-14 2018-06-29 周祥彬 一种收发球筒二次泄压螺栓保护装置

Also Published As

Publication number Publication date
US20230171912A1 (en) 2023-06-01
GB202309804D0 (en) 2023-08-16
DE102020119779A1 (de) 2022-01-27
CN116195373A (zh) 2023-05-30
JP2023535597A (ja) 2023-08-18
EP4190135A1 (fr) 2023-06-07

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